Dresden 2020 – wissenschaftliches Programm

Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

TT: Fachverband Tiefe Temperaturen

TT 6: Cooperative Phenomena and Phase Transitions (joint session MA/TT)

TT 6.14: Vortrag

Montag, 16. März 2020, 12:45–13:00, HSZ 401

Concept of geometrically controlling artificial magnetoelectric materials — •Oleksii M. Volkov1, Ulrich K. Rößler2, Jürgen Fassbender1, and Denys Makarov11Helmholtz-Zentrum-Dresden-Rossendorf, Dresden, Germany — 2Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e. V. (IFW Dresden), Dresden, Germany

Magnetoelectric materials combine coupled magnetic and electrical order parameters, that allowed to control magnetic states via electrical influence and vice versa [1]. This offers exciting prospectives for energy efficient memory, logic and sensor devices. Here, we propose a new approach to electric field controlled nanomagnets [2], where the manipulation of magnetic states is done geometrically via modification of mesoscale Dzyaloshinskii-Moriya interaction and curvature-induced anisotropy [3]. The concept refers to geometrically curved helimagnetic springs embedded in a piezoelectric matrix or sandwitched between two piezoelectric layers. The electric field induces tiny changes of geometrical parameters, that leads to the transition between homogeneous and periodic helimagnetic states. This results in the appearance of strong converse magnetoelectric effect (CME) 15 × 10−3 (A m−1)/(V m−1), which is five times higher than CME for best laminated magnetoelectric composites 2.9 × 10−3 (A m−1)/(V m−1).

[1]  W. Eerenstein et al., Nature 442, 759 (2006).

[2]  O. Volkov et al., J. Phys. D: Appl. Phys. 52, 345001 (2019).

[3]  O. Volkov et al., Scientific Reports 8, 866 (2018).

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2020 > Dresden